Second Life

What is Second Life?

Second Life is a free online virtual world imagined and created by its Residents. From the moment you enter Second Life, you'll discover a fast-growing digital world filled with people, entertainment, experiences and opportunity.

**http://secondlife.com/**

http://secondlifegrid.net/slfe/education-use-virtual-world - Using Virtual Worlds in Education Programs

http://campustechnology.com/articles/2009/02/18/real-life-teaching-in-a-virtual-world.aspx -Real-Life Teaching in a Virtual World